Oscillating motor fan



NOV. 27; 1934. w, A 1,982,537

x OSCILLATING MOTOR FAN Filed Dec. 12 1932 2 Sheets-Sheet l Inventor:

UNITED STATES PATEN T Flcs' 1,982,537 OSOILLATING MOTOR FAN Werner Rathel, Berlin-Neukolln, Germany, as-

" -signor to Reiss & Klemm, Berlin, Germany, a

of Germany Application December 12, ieaaserialno. 646,900 Germany May 9, 1932 2 Claims. (01. 230-256) It is known that the oscillating effect of a fan are arranged oscillating around the vertical axis can be produced by a crank gearing coupled withof the column 1. The motor of usual constructhe motor of the fan. In most constructions of tion has the bracket 5 which contains the bearthis kind hitherto known the crank is linked to a ingsfor the motor shaft 14. The bracket 5 sup- 5 rigidly fixed pin outside the motor casing and ports a frame for the gearing. For this purpose together with the oscillating arm visible from the the threaded holes 6 and"? are bored in that por'- outside. It 'is true that thus a simple gearing tion of the bracket 5 seen in Fig. 1,-which contains between the fan shaft and the crank becomes posthe bearing 8 The motor shaft extends through sible, but there is the disadvantage that such the bearing 8 and is threaded at the projecting l0 gearing must be located in a separate casing and portion. that, when incautiously handled, .the oscillating Between the base 1 and the motor casing 2' there arm of the crank is exposed to injury and thus is,'rigidly secured to the base, plate 11, to which easily distorted. Such distortion provokes interan equally stationary pin 10 is secured. This ruption of the working. Besides the separate latter projects through the segmental slot-12 into 15 casing increases the cost of manufacture and also the motor casing and forms with'its upper end as well as the oscillatingarm arranged outside the stationary fulcrum of an oscillating link 13 the casing affects the ornamental appearance of connected with an arm of the crank 26 (Figure 6). the fan, especially in small, elegant table fans. The segmental slot 12'is concentric with the ver- Mcreover the bearings for the gearing and the tical rotating axis ofthe motor casing. The slot 20 crank in the constructions hitherto known require therefore permits the oscillating movementof the a particular shape of the motor casing, so that casing. The crank linked to the oscillating arm standard casings cannot be employed. For this 13 is together with its gearing arranged on a sepreason it is. not possible subsequently to mount in arate framev 15 (Fig. 2). The frame 15 has two a fan without oscillating movement a device bearings 16 for supporting a shaft 17, to which a 25 changing such fan into one of the oscillating type. Worm wheel 18 is fastened. After the insertion Said vdifliculties are overcome by the present of the frame 15 the worm'wheelis in mesh with'.

invention which is likewise based on the known the motor shaft 14 as shown in Fig. 2 and Fig. 3. construction of a fan that oscillates by means of The shaft 17 carries at its lower enda. spur a crank driven by the fan motor and linked to a gear 23, which is in mesh with the larger spur 30 stationary pin. gear 24. The spur gear 24 is secured to the According to the invention the crank pin is shaft of the crank 25,'which is supported by a inside the motor casing and is linked to astationbifurcated portion 31 of the frame 15. The crank ary pin, which latter is outside the casing rigidly 26 is secured to the lower end of the shaft 25,

fixed to thebase and .extends into the interior of and the crank pm 2'? is eccentrically fastened to 35 the casing through a slot shaped-in accordance the crank. The oscillating arm 13 is linked to to the casing,

with the oscillating movement. f the pin 27, the other. end of which, provided with The arrangement. of the gearing, theoscillatin'g a hole, is, when the frame 15 is being inserted,

arm and the crank inside the motor casing reset upon the pin 10 (Fig. 6)

quire,- if subsequent insertion of the oscillating The frame 15 has an oblong opening 19 (Fig. 2)

0 mechanisrnis desired, further measures of a speof sucha size that the bearing 8 of the motor cial kind which can be best illustrated by the shaft can pass through when the frame is infollowing drawings. -serted. Besides the frame. 15 is provided with, In the' accomp nyin drawings Figures 1-6 two smaller oblong holes '20 and 21, which coneillustrate the invention, L spond with the threaded holes 6 and 7 of the 45 Fi -lshowsavi w pa l in cti n, motor bracket 5. Now two threaded pins are 6 Figs. 2 and 3 th ra k ri n its in screwed through the openings 20 and 21 in the incombination with a disengaging device, holes 6 and 7, not far enough, however, to press,

Fig. 4 the disengaging device alone, p the heads of the threaded pins on the frame 15 r Fig. 5 the fastening of the guard cage of the fa or the motor bracket 5. On' the contrary, there remains a clearance suflicient forthe movement Fig. 6 is a vertical section of the device through of the frame 15 in the direction of the arrows 22. f the plane of the motor shaft. v. The frame 15 is during its movement further According to Fig. 1 the fan consists of the base guided by the slide-bars 28, which are arranged or columnd, above which the motor. casing 2 above and below at the motor bracket 5.

. inclusive of the propellers 3 and the guard cage 4 The movement of the frame 15 in the sense of t the arrows 22 engages the-worm'wheells with the motor shaft 14 or disengages it from said motor shaft. The disengaging device required for this is particularly marked in Fig. 4, while Fig. 3 shows the frame in cooperation with the disengaging device, both parts seen from above.

The frame 15 has two stops 251 and 30. Against the stop 29 presses the pin-like end 38 of a lever provided with the handle 35, which lever is guided in the slantwise cut bush 3'? secured to the frame 32 (Figs. 3 and 4). To the pin 38 is secured a projecting piece 36, which at the rotation of the pin around its axis slides along the, oblique surface of the bush 3'7 and thus effects a forward movement of the pin 38. The forward movement communicates itself to the frame 15, which in this way is likewise moved forward, by which movement the worm-wheel 18 is disengaged from the motor shaft 14. During this movement a'spring 4'7 (Fig. 3) acts upon the crank frame against the forward pressure of the pin 38.

When the worm-wheel 18 is to be engaged again with the motor shaft, the handle is to be turned in the opposite direction. The spring 47, which was put under tension during the forward movement, leads the frame 15 back to its original position, by which the worm-wheel 18 is again put in mesh with the shaft 14.

The degree of coupling (respectively the final position of the back movement) is regulated by the adjusting screw 34, that touches the stop 30 of the frame 15. Such adjusting screw 34 is supported by the frame 32, which'with its hole 33 (Fig. 4) is set upon one of the brush holders 9 (Fig. 1) and is here secured with nuts 39 (Fig. 3). The spring 47 is placed on the second brush holder and also secured between two nuts.

The construction of the oscillating mechanism and the motor is clearly shown in Fig. 6, and. in this figure are also shown the commutator 58 and the brush holders 9, which are shown in detail in Fig. 3. Fig. 6 also shows in detail the means for mounting the motor and easing on the base 1. The motor and its mounting are well known in the art and, specifically, form no part of the present invention.

The frame 5 of the motor is rigidly secured to the stator iron 48. Angular supports'49 and 50 are secured to the stator iron. The angular support 49 is secured by the screw. 51 to the casing 2 which has the closing cap 2a. The. angular.

support 50 has a bore with internal thread wherein a tube 52 is screwed. For this purpose, the tube 52 is provided on the upper part with an outer thread 53. The casing 2 is provided at a suitable place with a bore through which the tube 52 is inserted. When the tube 52 is screwed into the bore, a collar 54 of the tube 52 presses the casing 2 against the angular member 50.

The tube 52 is now adapted to be rotated in a vertical position in the base column 2. For. this purpose. the base column is hollow and bored upwardly in the vertical central axis. A guide bushing 56 fits tightly inthe bore. The upper edge of the said-bushing engages over the plate 11 on which the stationary pin 10 for the oscil-' lating arm 13 is mounted and securely riveted.

The plate 11 is thus rigidly secured to the column between the. upper edge of the guiding bush 56 and the collar 54 of the tube 52. The tube 52 is also provided on the lower part with an outer thread 59 whereon a nut 57 may be screwed. By tightening the said nut, the casing 2 is secured against the base columnand the pressure of the spring washer 55, which is exerted during the oscillating movement, is adjusted.

Finally, it is obvious from Figure 6 that the left end of the motor shaft 14 has screw threads 14a which are adapted to engage with the worm wheel 18 (Fig. 2). I

To permit theme of standard casings without additional working, the guard cage of the fan is fastened in a very suitable way. Fig. 5, showing a section through the empty motor casing (without hood), illustrates this kind of fastening.

The motor casing 2 is at the left side reduced in the customary way. The reduced portion 43 supports a circular clip 40, slit in one place, with two flanges 44 atthe slit. The flanges 44 are provided with holes, one of which is threaded for receiving the set-screw 41. The clip is by screwing a nut on the bolt 41 pressed on the reduced portion 43. Along the circumference of the clip 40 there are in adequate distances short portions 42 of the clip 40'pressed out to form plain pedestals, through which the ends of the struts 4, which are bent over, are passed. Such ends are soldered up in the portions 42 in such a way that before mounting the clip! 40 the soldering mass is poured from the inside in the openings 46, which have been produced by the pressing 'out of the portions 42.

What I claim as new and desire to secure by Letters Patent of the United States, is:

1. In an electric oscillating fan the combination .of a motor driving said fan, a gearing, a crank, an

oscillating arm and astationary pin, said gearing connecting said crank with the shaft of said motor, said crank being connected with said stationary pin by said oscillating arm, said gearing, said crank and said oscillating arm being completely enclosed in the casing of said motor, said casing being provided with a slot, said stationary pin extending through said slot into the interior of said extending through the segmental slot into the casing, a motor mounted within the casing for driving the fan, gearing enclosed within the easing and driven by the motor, said gearing including a rotatable crank, and a link within the casing connecting the crank with the fixed pin so that rotation of the. crank oscillates the casing on its vertical pivot.

WERNER RATHEL. 

